US1713368A - Plaster-cast-cutting machine - Google Patents

Description

May 14, 1929. G. BoGGlo PLASTER CAST CUTTING MACHINE Filed Sept. 9, 1926. 2 Sheets-Sheet l INVENTOR ATTORNEY WITNESS:

May 14, 1929. G, BoGGlo I PLASTER CAST CUTTING MACHINE Filed sept. 9, 192e 2 Sheets-Sheet 2 www 53j@ EY u `INVENTOR Patented May 14, 1929.

L. @UNITED sTATEsPATENT OFFICE.

f vantages lin view,

GIUsTo BoeGIo, or RoYALToN, ILLINOIS.

PLASTBfCAST-CUTTING MACHINE.

VApplication illed September 9, 1926. Serial No. 134,587.

This invention relates to surgical implements, particularly to saws orcutters, and has for its object the provision of a novel device by means of which plaster casts about broken limbs or other parts of the body ma be quickly and easily cut to facilitate or e fect removal thereof, the device being intended principally for use sicians, hospital attendants and others having occasion to employ it.

An important object is the provision of a device of this character which `is electric motor operated and which will operate with considerable power and efficiency for carrying out the purpose for which it is intended.

Another object is the provision of a device of this character provided with means for easily regulating the depth of the cut made bythe rotary saw. ,y

Another object is to provide a deviceiof this character in l which the cover section carrying the motor is removable from the main orv body portion of the device so as to facilitate access to the motor for the urpose of oiling or making any repairs w ich may be necessary.

` n additional object is the provision of a device' of this character which will be .comparatively simple Vand( inexpensive in manufacture, easy to use, efficient and convenient in action, durable inservice, and a general improvement in the art.

With the above andY other objects and adthe invention consists in the details of construction,` thel combination and arrangement of parts to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in

which Figure 1 is a side elevation of the device. Fi re 2 is a vertical longitudinal sectiona view, taken on the line 2 2 of Figure 3 Figure 3 is a cross sectional view taken on the line 3 3 of Fi re 1.

Figure 4 is a detai line 4 4 of Figure 3.

Figure 5 is a detail section taken on the line 5 5 of Fi re 2.

Figure 6 is agttom plan view ofthe cover removed from the main or body portion of the device.

Figure 7 is a side elevation of the device, with a part broken away and in section, and showing the action of the adjusting means, and

y a casing designated as by surgeons, phyY sented the securing Ymeans as com section taken on the 30 Figure 8-is a fragmentary View taken on the l1n`e 8 8 of Figure 1.

Referring more particularly to the drawi ings, I have shown the device as com rising a whole by die numeral 10, this casin being of. any desired size and shape as wel as material and finish. In the present instance the casing is shown as including side portions 11 and 12V and forward and rear end ortions 13 and 14 respectively. The top of) the casing is open and normally closed by a casing section 15 which is formed with or secured to a to P member 16, the members 15 and 16 togetherconstituting a closure for y the easing. Any suitable means may be ro: vided for holding the section 15 in p ace though in the present instance I have repreprising the rethe entire top of suitable screws17 passing through movable section and threaded into suitable bosses 18 within the casing 10.

Suitably secured to the underside of the section or top member 15 is an electric motor 19 of suitable power having its shaft 2O carrying a spur gear 21 adapted to mesh with a large spur gear 22 journaled on a stub shaft 23 .carried by the side wall v1 2 of the casing. J ournaled transversely through the lower portion of the casing isa shaft 24 on which is mounted a pinion 25 meshing with the spur gear 22 and on which is'also mounted and held, as b Aa set screw 26 a circular saw 27 which is ocated within the confines of a housing 28 secured upon thesiderwall 12, this housing acting as a vprotective shield for the saw durin the rotatlon thereof.

In order that ieftop section 15 may be detached from the main casing 10, carr ing with it the motor 19, the upper edge o the wall 12 is shown as provided `with a notch or opening 29 which accommodates the hub of the spur gear 21.

Suitably secured to the rear end wall 14 of the casing is a hollow handle structure which is slotted at its upper portion, as shown at 3l to provide or permit access to a handle 32 of a switch 33 mounted within the handle and connected with the current carrying Wires 34 which lead from any suitable source of current to the motor 19. By operating the switch handle 32, it is uite clear that the motor may be energize or deenergized at will. The exact details of construction of the switch are not given inasmuch as it may be any one of a number 2 Y w l 1,713,368

.bottommember being suitably hinged lat 36 at the forward end of the casing and having its rear end formed withan upward extension 37 slotted at 38 for the accommodationot a clampingscrew 39 which pro- .jects from the rear wall 14 and which carries 1a screw L10. l

In the roperation ofthe device,it will be apparent that 'by loosening the nut 40 the bottom memberV may be adjusted either upwardly or downwardly, as the `case may be,-so as to vary the degree of projection of the saw beyond it so that the cnt or depth of-cut ymade by 'the' saw may be -easily regulated. -Of course, after the proper adjustment is found, the'nut 40 should be tightened to maintain the parts in this position.

" VVheneverV it is desired to cut a plaster cast or the likeindicated at A, the operator takes the device -by the handle 13 and places it in positionupon the plaster cast and operates the switchl to-energize the motor. When the motoris in action litis of course apparent lthat the -gearing "interposed Vbetween its shaft andthe shaft twill operate to rotate the saw 27 at high speed, this saw acting to cutaway the plaster cast as indicated at B. 'V After'the casthas been cut 'nearly through, it is a simple matter -to 'break it along the line vot" sawing or -cut it by'soine other man ner so that it may be quickly and easily re- Y moved and without danger of injury to the patient.

"It orany reason it is necessary to repair or oilthe motor, the screws 17 may be removed andthe section 15 carrying the plate member 16 removed', the motor coming along withv it. This vinside AView of the top member is disclosed in VFigure 6. When this has been done-it is' of course apparent that access is readily had to the motor for the purpose of making any repairs or adjustment thereto. It is really believed `that theconstruction, operation and .advantages will be l readily apparent to one skilled in the art without further explanation.

IlVhile I haveV shown and preferred `embodiment of the invention, it should be understood that I reserve the right to. make such changes in the form,

construction, and arrangement of parts as willfnot depart from the spirit of the invention or'the scope of the .-subjoined claims IVhatI claim is:

1. A plaster cast cutting machine comprising a. casing provided with a handle, a removable top `section for the -casing,1an electric motor secured to Aand depending from the top section, the bottom section having one side wall provided 4with a notch ifor the accommodation of the motorshaft, ,-a drive pinion on the Vmotor shaft located within the casing, a ycircular saw journally supported by lthe casing, -and a train of gears permanently located within the casing and connecting the saw 4with Lsaid drive pinion. Y

2. A plaster cast cutting machine `comprising =a casing provided with -anV operating handle, a power mechanism located withinthe casing, a `rotary saw Vjournally supported bythe 'casing at one side thereof and projecting beyond the' bottom edge, transmission mechanism between said power mechanism and the saw for Veffecting-rotationof thelatter, andan adjustablyfmounted bottom member for the casing lacting ras Aa guide'or stop to adjust the depth of vcnt made by the saw, said member "being pivoted at its forwardl endto'the casing and having its rea-'r fend Aformed "with an 11,p'V

wardly extending portion havingV a slot therein, and a clamping member carried by the casing and passing through ,said slot for securing the 'hinged .bottom member in adjusted position. Y I

Y In testimony whereof I affix mysignature. Y

'Gi-Us'ro Bodem'.

described the y

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